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Physics
Physics
Problem
45. Wire I and wire II are made of the same material. Wire II has twice the diameter and twice the length of wire I. If wire I has resistance
R
R
R
, wire II has resistance (A)
R
/
8
R / 8
R
/8
(B)
R
/
4
R / 4
R
/4
(C)
R
/
2
R / 2
R
/2
(D)
R
R
R
(A)
R
/
8
R / 8
R
/8
(B)
R
/
4
R / 4
R
/4
(C)
R
/
2
R / 2
R
/2
(D)
R
R
R
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